Diamond tool assembly



July 7, 1953 J. LOECY, JR

DIAMOND TOOL ASSEMBLY Filed July 14, 1950 FIG 4 I INVENTOR." 1

J-OJEPH Loscx J? Arraqmsys Patented July 7, 1 953 ICE DIAMONDTOOLVASSEMBLY Joseph Loecy, Jr., Euclid, Ohio Application July 14, 1950,Serial N 0. 173,751

4 5 Claims. (01.125 11) The present invention relates to the art ofdiamond tools for dressing grinding wheels and is an improvementupon-the device disclosed in my co-pending application Serial No.62,449, filed November 29, 1948,-as well as that disclosed in myco-pending application Serial No.134,964, filedDecember 24, 1949. p f

According to the regular practice, as more fully explained in theabove-noted applications,

a diamond tool is adapted to be moved at intervals into position foroperative engagement with a grinding wheelfor dressing the same; and, inorder toalways present a new sharp point and to prevent the diamond fromwearing unevenly, the workman has heretofore been depended upon to turnthe diamond tool. But experience has shown that the workman can not bedepended upon always to make these adjustments when required and totheproper degree.

Therefore, in the present application as in those above noted, theobject is to devise an'assembly in which the diamond tool may be turnedslightly by combined hydraulic and mechanical means so as to alwayspresent a new sharp point of the diamond to the wheel and thus preventuneven wear of the diamond. a

A more specific object is to provide such a device with means forproducing the. desired degree of rotary adjustment of the diamond pointwith a'comparatively small longitudinal clearance of the adjusting meanstherefor.

Another specific object of my present form of invention is to provide animproved and positive form of means for ensuring adjustment of thediamond tool in onlylone directionrotatably about thelongitudinal axisthereof.

Other objects will appearfrom the following description when consideredtogether 'withrthe Y accompanying drawing and claims.

Fig. 1 is an elevation of a complete unit which embodies my presentinvention;

Fig. 2 is a longitudinal sectional forward end portion thereof; 1

Fig. 3 is a sectionaliview taken 'on line 3-3 view of the of Fig. 2; andr Fig. 4 is a sectional view taken on line 4--4 of Fig.2. i

It is to beunderstood that the present'form of disclosure is merely forthe purpose of illustration and that theremight be various modificationsthereof without departing from the spirit of my invention as herein-setforth andclaimed. My present assembly may be mounted, upon or attachedto any type of grinder; for instance, the spindle-shaft S..of..the-dresser barrel B-Lof such a machine may have this devicemounted thereupon in the manner indicated in Figs. 1 and 2 of thepresent drawing. My present device is of such design as to be ofsubstantially the same cross sectional diameter and form as the dresserbarrel B soas to constitute virtually a continuation thereof in form andappearance. This arrangement has also a decided mechanical advantagewith respect to the positioning of the tubular ducts for the hydraulicfluid, as will be understood.

The turner body I, which is mounted upon the spindle shaft S, hasprovided within the outer end thereof the plunger 2 which is adapted forlimited straight-line movement therewithin, there being suitable spaceallowed with respect to the fixed end cap 3, and theannular wall of theplunger 2 being provided withsuitable clearance for such movement. Theplunger 2 may be so mounted as to have its longitudinal axis .at anangle'to that'of the body I.

Extending radially inwardly from the cylindrical wall of the recess atthe forwardend of the body I, there is provided the fixed pin 4 whichhas co-operative engagement within the inclined slot 5 in the outersurface of the plunger 2; in fact, the outer surface of the plunger 2may beprovided with a plurality of such slots at as many differentanglesso that any one of them may be employed in connection with the pin4 according to the degree of turning movement of the plunger 2 that isdesired for a given longitudinal movement thereof. z

The pin 6, which extends radially inwardly from the inner surface of theplunger 2, has operative engagement within the slot 1 which is providedin the outer surface of the annular transmitting ring 8 and which isinclined in the opposite direction from that of the slot or slots 5 soas to amplify the rotary movement of the ring 8. j

The inner surface of the ring 8 is adapted to have one-way locking.engagement with the enlarged cylindrical rear end portion 9 of the toolholder I0 which has the tool H screwed into. the forward end thereof,with the diamond point !2 at the outer end of the tool II. This lockingengagement may consist of the spring-pressed pins I3 which are arrangedwithin the recesses M in the periphery of the enlarged portion 9 andwhich are adapted to have one-way binding engagement in the wedge-shapedspaces provided between the walls of their notches and-the inner pins l3are indicated at l3a and are seated in wells in the rear walls of therecesses 14.

Rotary movement of the plunger 2 and the ring member 8 in one directionwill, by virtue of the one-way clutch means, carry the tool-holder ltherewith as part of the unitary assembly; but, when the plunger 2 andring member 8 have rotary movement in the opposite direction, the clutchmeans will not be effective and the plunger and ring member 8 will turnalone and without turning the tool holder [0. In the present form ofillustration, forward movement of the plunger 2 and ring member 8 willresult in rotary movement of the same and also of the tool holder H],but the plunger 2 and ring member 8 in their rearward movement will notcause any turning movement of the tool holder 10. As a result, the toolholder and its diamond point will be turned in only one direction andthere will always be ensured a fresh portion of the diamond point forthe dressing operation.

Within the chamber provided within the main plunger 2, there is providedwhat may be termed a back-stop I5 which has a circular disk portion ofless diameter than that of the chamber therefor and which has a stemportion l5a extending rearwardly out through the rear wall of the mainplunger 2. Suitable sealing means l5?) surrounds the stem 5a, andsuitable sealing means are provided also about the tool holder l8 andabout the main plunger 2, as indicated by reference numerals la and 2a,respectively.

Hydraulic fluid may-be supplied to the rear end of the main plunger 2through the tube or duct [6 provided within the turner body I andextending through the dresser barrel B; and likewise, the hydraulicfluid may be supplied to the forward end of the main plunger 2 throughthe tubular passage l'l in the turner body and extending through thedresser barrel B. Cooling fluid may be supplied through tube l8 to thepoint of dressing. The tubes l8 and H are connected to a suitablecontrol valve like that shown in the above-noted co-pending applicationSerial No. 134,964, to which reference may be had for a fullerunderstanding with respect to this feature. Suffice to say, when thevalve is set in one position, the hydraulic fluid may be applied to therear end .of the main plunger 2 through the duct 16 so as to move theplunger forwardly while the fluid fills the space at the rear thereofand while the fluid at the forward end of the main plunger is forced outthrough the tubular passage l1 and through the valve to the reservoirfor the hydraulic fluid in the same manner as more fully explained inthe above-noted co-pending applications. Then, when the valve is set inits other position, the reverse flow of the hydraulic fluid will takeplace; that is, it will be applied through duct H to the front end ofthe main plunger 2 so as to force the same rearwardly and, at the sametime, the fluid at the rear of the main plunger will be forced outthrough the tubular passage i6 and the valve to the reservoir. vIt mightbe explained that there is sufiicient clearance between the innersurface of the main plunger 2 and the outer surface of the ring 8 topermit the hydraulic fluid to pass therebetween, during rearwardmovement of the main plunger, and to flll thespace within the mainplunger to the rear of the disk portion iii of the back-stop whichremains stationary during the movements of the main plunger; and thepressure: of the hydraulic fluid within this space will serve to ensurethat the member l5 wil1 be maintained 4 in the position indicated inFig. 2 of the drawing so as to hold the enlarged portion 9 against thefixed end cap 3, as seen in Fig. 2. Here it might be pointed out thatthe ring 8 and tool holder l0 have only turning movement about thelongitudinal axis and do not have longitudinal movement therealong.Slight clearance may be provided at the forward end of ring 8 so as toensure against the same sticking. My present improved device may bemounted for movement laterally into and out of engagement with the work.

As above explained, the forward movement of the main plunger 2 by thehydraulic fluid is converted into a turning movement thereof by virtueof the pin and slot mechanism, with the result that the main plunger 2has a spiral movement about the'longitudinal axis of the device. Suchmovement of the main plunger will, by virtue of the pin and slotconnection with the ring 8, cause an amplified turning movement thereof;and, with this arrangement, there may be obtained the desired degree ofturning movement of the ring 8 with a comparatively short longitudinalmovement of the main plunger. As also explained above, the'turning ofthe ring 8 will effect locking engagement thereof with the tool holderand these two parts will turn together as a unit so as to adjustrotatably the position of the tool holder'and the diamond point carriedthereby. When-the tool holder has been rotatably adjusted in the'mannerexplained, it will be eflectively held in suchposition by the pressureof the hydraulic fluid which will hold the enlarged portion 9 of thetool holder against the end cap 3. To repeat, such turning'of the toolholder takes place-only duringthe. movement of .the main plunger 2 inone direction-thereof, in the forward direction according to the presentform of illustration, by virtue oftheparticular arrangement of theoneway "clutch engaging means between the ring 8 andxthe 13001 holder.I8. Whereas such engagement iseffective during movement of the mainplunger 2 its'one direction, there will be free relative movementbetween the tool holder I0 and the ring 8 during the movement of themain plunger-:2 in the opposite direction.

Notable among the practical advantages of the presentiformzof device isthe positive and dependablecharacterof the automatically effectedoperation of themeans for producing the turning movement of the toolholder in only one direction, that is during the movement of the mainplunger in only one direction, and with a relativelyishort'extent ofsuch longitudinal movement of the main plunger. Furthermore, the entiremechanism is of comparatively simple and compact rorm andis capable ofoperationin an efficient and dependable manner as has already beendemonstrated by actual use of this device in the trade.

What'L claim is:

1. In a device of the class described, the combination ofa cylindeigaplunger within said cylinder and reciprocatable therewithin, meansincluding hydraulic means connected to said cylinder for effecting suchreciprocatable movement or saidrplunger:pin andinclined slot meansoperatively :arranged between said cylinder and plunger for convertingthe'forward and rearward movement of said'plunger into rotary movementthere'of,-an annular-ring within'said plunger and havingpin and inclinedslot means of connection withsaid plungerfor amplifying the rotarymovement orsaid annular .ringbysaid plunger, a tool holder within saidannular ring, and one-way means of clutch connection between saidannular ring and said tool holder for transmitting tov said tool holdersaid amplified rotary movement of said ring in only one directionthereof.

2. In a device of the class described, the combination of a cylinderwith an inwardly extending "front end cap portion, a plunger within saidcylinder and reciprocatable therewithin, a tool holder extending throughsaid inwardly extending forward end cap portion and having an enlargedrear end portion located within said plunger with lateral clearancebetween said tool holder and said plunger, the enlarged rear end of saidtool holder being spaced from the rear wall of said plunger and havingits front end adapted for engagement 7 with-the said cap portion, meansconnected to said cylinder for moving said plunger forwardly orrearwardly, means of operative connection between said cylinder andplunger for automatically converting the forward and rearward movementof said plunger into rotary movement thereof, and

means of operative connection between said plunger and tool holderfortransmitting to said tool holder the rotary movement of said plunger inonly one direction.

3. In a device of the class described, the combination of a cylinder, aplunger reciprocatable' within said cylinder, operating means for saidplunger including hydraulic pressure means connected to said cylinderfor effecting straight-line movement of said' plunger and including alsomeans of operative connection between said plunger and cylinder forconverting the straightline movement of said plunger into rotarymovement of said plunger, a tool holder, and means of operativeconnection between said plunger and tool holder including means fortransmitting to said tool holder an amplified turning movement in onlyone direction thereofi 4. In a device of the class described, thecombination of a cylinder, a plunger within said cylinder andreciprocatable therewithin, hydraulic means connected to said cylinderfor moving said plunger forwardly and rearwardly, means of operativeconnection between said cylinder and plunger for automaticallyconverting the forward and rearward movements of said plunger intorotary movement of said plunger, a tool holder, and means of operativeconnection between said plunger and tool holder including means fortransmitting from said plunger to said tool holder an amplified turningmovement in only one direction thereof.

5. In a device of the class described, the combination of a cylinder, aplunger within said cylinder and reciprocatable therewithin, hydraulicmeans connected to said cylinder for moving said plunger forwardly andrearwardly, means of op- I erative connection between said cylinder andplunger for automatically converting the forward direction thereof.

JOSEPH LOECY, JR.

References Cited in the file of thispatent UNITED STATES PATENTS NumberName Date 140,637 Nutting July 8, 1873 416,147 Edgerton Nov. 26, 1889886,407 Rice May 5, 1908 1,3532? 5 Scheider Sept. 21, 1920 1,588,406Gilman June 15, 1926 1,946,309 Cofiman Feb. 6, 1934

